The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 1994
Filed:
Oct. 22, 1992
Robert W Johnson, Marcy, NY (US);
Laser Precision Corp., Utica, NY (US);
Abstract
A passive distribution net connects a host digital terminal to a number of optical network units which service respective subscribers. Transmit and receive feeder fibers branch out to the optical network units with optical power splitters. An out-of-band laser light is blended with the communications wavelength on the transmit feeder at the host digital terminal and is stripped at the receive feeder using wave division multiplexers. Similar wave division multiplexers at the optical network units are coupled by an optical shunt to carry the out-of-band light around each optical network unit. This arrangement monitors network integrity and can discern fiber failure from optical network unit failure.